Needle.



1'. H. SCHOMBURG.

NEEDLE. APPLICATIONy FILED 00T. 23,1907.

Patented Jan. 11,1910.

v narran semanas earner The FREDERICK H. SCHOMBURG, OF BROOKLYN, NEWYORK.

NEEDLE.

Specification of Letters Patent. Patented Jan. 1li, 1910.

Application led October 23, 1907. Serial No. 398,797.

To all whom 'it may concern:

Be it known that I, FREDERICK H. SoHoMj- BURG, a citizen of the UnitedStates, and resident of the borough of Brooklyn, in the county of Kingsand State of New York, have invented certain new and useful Improvementsin Needles, of which the following is a specication.

This invention relates to thread retaining needles, and its object isthe production of a needle in the head of which is formed an opening forthe thread, which opening is narrowed to form a contracted wedgeshapedslot at one or both ends of the longitudinal axis of said opening, andin which -slot or slots the thread will be wedged in the operation ofsewing, so as to securely hold the same when the thread is pulledthrough the material that is being sewed.

A further and important object of theinvention is to form the openingsin the head of the needle without adding an extraneous element thereto.

In the drawings Figure 1 shows an enlarged elevation of a needle with myinvention incorporated therein, Fig. 2 represents a partial section ofFig. 1 on the line 2, 2, Fig. 3 is an enlarged elevation of another formof the invention, and Fig. 4 shows a section of Fig. 3 on the line 4,4.v

Referring to Figs. 1 and 2, the body of -a needle is represented at 10,which is of slightly larger diameter at about its central portion 11than at its ends. In,the head 12 is formed an elongated eye 13 whosewalls converge in one plane toward the end of the needle to produce awedge-shaped slot 14 as best seen in Fig. 1. The roof 15 of this slot isstruck on a convex curve as best seen in Fig. 2, and as the roof extendslengthwise of the apex of the slot it of course stands in a plane atright angles to that in which the Walls converge. Along the sides of theneedle grooves 16, 17 extend from the opening 13 to form clearancespaces for the In Figs. 3 and 4 a double pointed needle is representedwith the pointed ends 25, 26.

ody 27 of the needle is slightly 'larger in diameter at about itscentral portion 28, than at other parts thereof. In the head 29 isformed an elongated opening 30, having the wedged shaped slots 31, 32,at the ends thereof and parallel with the opening 30 andthe longitudinalaxis of the needle.. The roofs 33, 34 of the slots are convex curves soas not to injure a thread 35 when secured therein. These roofs vstand ina plane at right angles to that in which the Walls of the wedge-shapedslots converge, the same as above described for the needle shown inFigs. 1 and 2; Grooves 37, 38 are formed on opposite sides of the slots31, 32 to form clearance spaces for the thread 35.

The object of the two slots in the double pointed needle is to securethe thread in either one of said slots, should it become loose when theneedle is forced through material in opposite directions. When theneedle is always forced through the material in one direction, the formshown in Figs. l and 2 is used, the thread being caught in the slot 14during the process of sewing, and which will evidently not becomedisengaged.

Having described my invention I claim:

1. The herein described needle provided with an elongated eye whereofthe extremity has its walls converging in one plane to produce awedge-shaped slot and the roof of said slot struck on a convex curve ina plane at right angles to said first plane, and longitudinal grooves onopposite sides of the needle extending across the ends of saidslot androof. 4

2. The herein described needle provided with an elongated eye whereofeach extremity has its walls converging in one plane to produce awedge-shaped slot and the roof of said slot struck on a convex curve ina plane at right angles to said first plane, and longitudinal grooves onopposite sides of the needle each extending from a point beyond the endof the roof of one slot, into and past the eye, to a point beyond theend of the roof ofthe other slot.

Signed at the borough of Manhattan in the county f New York and State ofNew York this 21st day of October A. D. 1907.

FREDERICK Il. SCHOMBURG.

Witnesses:

S. H. SMART, MARTIN ZIMANSKY.

